My 66 duetto alway runs great. I have been busy the last few months and haven't had it out in 2 weeks. It is a beautiful day here in SoCal so I thought I would drive it today. Unfortunately it won't start. I verified that I am getting fuel but I don't seem to be getting spark. When I measure across the coil I am only seeing around 7 volts. That seems low to me. I was always told that I should see 12v. It sounds like something has come lose or died? The motor cranks with authority and the battery reads 12v. Suggestions?